The order of reactivity in five-membered heterocycles is : pyrrole > furan > thiophene > benzene (for comparison). reason is the same as for pyrrole. … The transition state with oxygen atom positively charged resulting from the electrophilic attack on furan is, therefore, less stable than that of pyrrole. IsRead More →
Causes of high troponin levels sepsis, which is a severe and potentially life-threatening reaction to an infection entering the bloodstream. kidney failure or chronic kidney disease. heart failure. chemotherapy-related damage to the heart. pulmonary embolism. heart infection. myocarditis, which is inflammation of the heart. Are biomarkers elevated in unstable angina?Read More →
…with respect to the other—the eclipsed conformation is the least stable, and the staggered conformation is the most stable. The eclipsed conformation is said to suffer torsional strain because of repulsive forces between electron pairs in the C―H bonds of adjacent carbons. Why is half chair conformation of cyclohexane leastRead More →
Chlorine trifluoride has 5 regions of electron density around the central chlorine atom (3 bonds and 2 lone pairs). These are arranged in a trigonal bipyramidal shape with a 175° F(axial)-Cl-F(axial) bond angle. Is ClF3 stable? Pure ClF3 is stable to 180 °C in quartz vessels; above this temperature itRead More →